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MELBOURNE, AUSTRALIA - JANUARY 17: Amir Weintraub of Israel plays a forehand in his second round match against Philipp Kohlschreiber of Germany during day four of the 2013 Australian Open at Melbourne Park on January 17, 2013 in Melbourne, Australia. (Photo by Robert Prezioso/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 17:  Amir Weintraub of Israel plays a forehand in his second round match against  Philipp Kohlschreiber of Germany during day four of the 2013 Australian Open at Melbourne Park on January 17, 2013 in Melbourne, Australia.  (Photo by Robert Prezioso/Getty Images)